Tires and Wheels 475 |
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replace all four tires . ! Winter ( snow ) tires s11av0103
Winter tires are best suited for driving on snow-covered and icy roads . However , winter tires do not perform as well as summer tires and all season tires on roads other than snow-covered and icy roads .
& Tire Pressure Monitoring System ( TPMS ) ( U . S . -Spec. Models ) s11av02
The tire pressure monitoring system provides the driver with a warning message by sending a signal from a sensor that is installed in each wheel when tire pressure is severely low . The tire pressure monitoring system will activate only when the vehicle is driven . Also , this system may not react immediately to a sudden drop in tire pressure ( for example , a blow-out caused by running over a sharp object ).
If you adjust the tire pressures in a warm garage and will then drive the vehicle in cold outside air , the resulting drop in tire pressures may cause the low tire pressure warning light to illuminate . To avoid this problem when adjusting the tire pressures in a warm garage , inflate the tires to pressures higher than those shown on the tire inflation pressure label . Specifically , inflate them by an extra 1 psi ( 6.9
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kPa , 0.07 kgf / cm 2 ) for every difference of 108F ( 5.68C ) between the temperature in the garage and the temperature outside . By way of example , the following table shows the required tire pressures that correspond to various outside temperatures when the temperature in the garage is 608F ( 15.68C ).
Example : Tire size : 225 / 60R17 99H , 225 / 55R18 98V Standard tire pressures : Front : 33 psi ( 230 kPa , 2.3 kgf / cm 2 ) Rear : 32 psi ( 220 kPa , 2.2 kgf / cm 2 ) Garage temperature : 608F ( 15.68C )
Outside temperature
Adjusted pressure [ psi ( kPa , kgf / cm 2 )]
Front Rear
If the low tire pressure warning light illuminates when you drive the vehicle in cold outside air after adjusting the tire pressures in a warm garage , re-adjust the tire pressures using the method described above . Then , increase the vehicle speed to at least 20 mph ( 32 km / h ) and check to see that the low tire pressure warning light goes off a few minutes later . If the low tire pressure warning light does not go off , the
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tire pressure monitoring system may not be functioning normally . In this event , go to a SUBARU dealer to have the system inspected as soon as possible . |
While the vehicle is driven , friction between tires and the road surface causes the tires to warm up . After illumination of the low tire pressure warning light , any increase in the tire pressures caused by an increase in the outside air temperature or by an increase in the temperature in the tires can cause the low tire pressure warning light to go off .
It may not be possible to install TPMS valves on certain wheels that are on the market . Therefore , if you change the wheels ( for example , a switch to snow tires ), use wheels that have the same part number as the standard-equipment wheels . Without four operational TPMS valve / sensors on the wheels , the TPMS will not fully function and the warning light in the instrument panel will illuminate steadily after blinking for approximately one minute .
WARNING
If the low tire pressure warning light does not illuminate briefly after the ignition switch is turned on or the light illuminates steadily after blink-
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Maintenance and Service
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